A gas-liquid separator and its application

Abstract

A gas-liquid separator and an application thereof. The gas-liquid separator comprises a closed housing; a gas separation membrane fixing inner frame is disposed inside the housing; the inner frame is fixed on a pedestal of the housing; the inside of the inner frame is used as a liquid storage cavity; a gas storage cavity is formed between the inner frame and the housing; a gas outlet is disposed on the housing at the gas storage cavity; a gas-liquid mixing inlet is disposed on the inner frame; a liquid outlet is disposed on the housing; the liquid outlet is connected with one end of a liquid discharge pipe; the other end of the liquid discharge pipe passes through the walls of the housing and the inner frame and extends to the middle part of the inner frame; three liquid level sensors are disposed on a side surface of the inner frame perpendicular to the pedestal; Projections of probes of the three liquid level sensors on their mounting surfaces and the pedestal are in triangular distribution, and the projection of the geometric centre of the inner frame on the surface where the liquid level sensors are mounted is within the triangular area formed by the projections of the three probes. The gas-liquid separator of the invention prevents the high sensitivity to direction for traditional gravity separation.

Description

technical field [0001] The invention relates to a gas-liquid separator, in particular to a gas-liquid separator used in a portable fuel cell system. Background technique [0002] Direct liquid feed fuel cell is an electrochemical reaction device that directly converts chemical energy in liquid fuel (such as methanol, ethanol, methanol, dimethyl ether, etc.) into electrical energy. Since the direct liquid feed fuel cell system avoids complex structures such as fuel reforming and purification, and the fuel storage and portability are convenient, the system structure is relatively simple, and it has broad application prospects in the field of portable mobile power sources. [0003] Direct methanol fuel cell (DMFC) is currently the most extensively researched type of fuel cell fed with liquid fuel. During the working process of DMFC, the fuel (methanol aqueous solution) enters the catalytic layer through the diffusion layer along the flow field channel of the anode plate, and t...

AI Technical Summary

Problems solved by technology

The gas-liquid separator with this structure takes up a lot of space in the system, and the integration degree is not high. It needs another container as a fuel feed tank, which is not conducive to the improvement of the overall efficiency of the system.

[0005] On the other hand, traditional gas-liquid separators for direct liquid-fed fuel cell systems are sensitive to direction, that is, they can only operate normally in a certain fixed direction

When the direction of its placement is changed, the separator not only has no effect on gas-liquid separation, but also causes liquid to leak from the gas discharge channel and gas to enter the fuel mixing tank, thus affecting the normal operation of the fuel cell system

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